Allways Roaming

Ok well I was in the process of installing the steel droid rom onto my d3 when after step 9 where you flash your device my phone begantosay its roaming and my 3g didnt work anymore. I ignored it and continued the process. I now have the steel droid rom on my phone so I tried fixing the roaming problem by going to the settings and changing the network thing from global to the other setting and back. I now have no service at all not even the roaming sign. Can someone please tell me how to fix it?